<div class="input-group date form_date">
    <input class="form-control" size="16" type="{{ widget.type }}" name="{{ widget.name }}"  {% if widget.value != None %}value="{{ widget.value|stringformat:'s' }}" {% endif %}
           readonly {% include "django/forms/widgets/attrs.html" %}>
    <span class="input-group-addon"><span class="glyphicon glyphicon-calendar"></span></span>
</div>
